package day02;

public class LongDemo {
    public static void main(String[] args) {
        long a=1000000000L*2*12;
        long b=1000000000*3*10L;//前面30亿超出int范围导致溢出
        System.out.println(a);
        System.out.println(b);

        double c=6.0,d=4.9;
        System.out.println(c-d);
    }
}
